https://forge.codesys.com/forge/talk/CODESYS-V2/thread/96bf1d1c3d/2020-02-27T22:11:10.651000ZRecent posts to copying program to flash memory and 750-842 redundancy2020-02-27T22:11:10.651000Z2020-02-27T22:11:10.651000Zshooterhttps://forge.codesys.com/u/shooter/https://forge.codesys.comc88cfb77deef8d92fd70b59eb96784190523bc12

<div class="markdown_content"><p>1) use event in resources task<br/> 2) make it boot (be sure the switch is correct position under the small lid.</p></div>

2020-02-27T22:11:06.357000Z2020-02-27T22:11:06.357000Zjbordelonhttps://forge.codesys.com/u/jbordelon/https://forge.codesys.comcb9e414521b942aa362d96be5076ed0b17135706

<div class="markdown_content"><p>Hi,</p> <p>I have a redundant setup with two 750-842's communicating tcp/ip via modbusmaster udp FB with a 750-352 dumb i/o setup.</p> <p>1) I have wired connections between the 842's so that if the primary PLC fails, the backup receives an input and takes over. Is there an easy way/FB available that would allow me to skip the main body of the program as long as the primary PLC is OK?<br/> The redundancy requirements do not require the PLC's be synced. I believe the term is a "Master Relay Function" where the program would simply be idle until it is called to take over. </p> <p>2) When I lose power to my controller, the program is erased. How do I use Codesys 3.2 to write the program to flash memory?</p> <p>Thanks,<br/> Jason</p></div>